#if !defined(_ARITHEXPR_H_)
#define _ARITHEXPR_H_


// ARITHMETIC EXPRESSIONS

#include "expression.h"

// ADDITIION
class binary_plus: public binary_operator_expression {
   public:
      binary_plus(expression*,expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// SUBTRACTION
class binary_minus: public binary_operator_expression {
   public:
      binary_minus(expression*,expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// DIVISION
class division: public binary_operator_expression {
   public:
      division(expression*,expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// MULTIPLICATION
class multiplication: public binary_operator_expression {
   public :
      multiplication(expression*,expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};


// THE 'POSITIVE' SIGN
class unary_plus: public unary_operator_expression {

   public:
      unary_plus(expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// THE 'NEGATIVE' SIGN
class unary_minus:  public unary_operator_expression {

   public:
      unary_minus(expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// SIN FUNCTION
class sin_function: public function_call {
   
   private:
      expression* arg[1];
   
   public:
      sin_function(expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// COS FUNCTION
class cos_function: public function_call {
  
   private:
      expression* arg[1];

   public:
      cos_function(expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};

// TAN FUNCTION
class tan_function: public function_call {

   private:
      expression* arg[1];

   public:

      tan_function(expression*);
      double evaluate(double*) const;

      expression* clone() const;
      void print(ostream&) const;

      expression* simplify() const;
};


#endif